Inspector Darkney is a Horde Inspector, that works for Horde Prime, on Horde World. This humanoid villain seems to have to authority over Hordak.

Cartoons:

Filmation Cartoon Canon:

Inspector Darkney was sent by Horde Prime to inspect the Fright Zone and to see how Hordak's fight against the Great Rebellion was going.

Darkney had a plan of his own to defeat the Rebellion, by using a Crystal Dome Generator to put up an inescapable dome over the Whispering Woods and have Attack Bats (already placed inside the Woods in crates) attack the Rebels. This plan was thwarted by She-Ra, He-Man and their grandfather King Miro.